There are two issues with this that I would caution you about.

1- There is a bit of a 'curve' where the battery discharges less at X charge, more at X charge, so as others have said, recharge it and see how many flights you get!

2- as your flying through the air it takes a heck of alot more power to move a control surface than if stationary on the ground.  And, of course, flights are different.  In theory, your servos will have more draw in the air than on the ground because of the greater amount of force they need to exert.

If you do still want to test it on the ground, my suggestion, if you have a simulator, use your DX6i transmitter, and leave the Rx on, that would be the most consistent and realistic test (jt would, in essence, be almost the same movements as a real flight.)